1LX8 | A:1-55 | REGULATION OF DIRECTIONALITY IN BACTERIOPHAGE LAMBDA SITE-SPECIFIC RECOMBINATION: STRUCTURE OF THE XIS PROTEIN |
1RH6 | B:1-52; B:1-52 | BACTERIOPHAGE LAMBDA EXCISIONASE (XIS)-DNA COMPLEX |
2OG0 | B:1-52; B:1-52 | CRYSTAL STRUCTURE OF THE LAMBDA XIS-DNA COMPLEX |